Wood-planing machine for curved work.



No. 664,5l9. Patented Dec. 25, I900.

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W000 PLANING MACHINE FOR CURVE!) WORK.

(Agi'plficnticn Med Mar. 16, 2897.)

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No. 664,519. Pateniedflec. 25, 1900.

B. n. WHITNEY.

WOOD PLANING MACHINE FDR CUBV'ED WORK.

(Application filed in. 1a, 1897.)

(No Model.) 4 $heetsSheet 2.

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No. 664,5l9. Patented Dec. 25, I900. B. D. WHITNEY. WOOD PLANING MACHINE FOR CURVED WORK.

. (A plication filed Mar. 16, 1897.,

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N0. 664,5l9. Patented Dec. 25;]900.

u. WHITNEY.

WOOD PLANING MACHINE FOR CURVED WORK. (Application filed Mar. 16, 1897.) (No Model.)

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NITED STATES PATENT CFFICE.

BAXTE R D. WHITNEY, OF WINGI-IENDON, MASSACHUSETTS;

WOOD-PLANING MACHINE FOR CURVED WORK.

SPECIFICATION forming part of Letters Patent No. 664,519, dated, December 25, 1900. Application filed March 16. 1897. Serial No. 627,875. on, model) To all whom it may concern Be it known that I, BAXTER D. WHITNEY, a citizen of the United States, residing at Winchendon, in the county of Worcester and State.

of Massachusetts, have invented a new and useful Improvement in Wood-Planing Machines for Curved Work, of which the following is a specification, reference being had to the accompanying drawings, forming a part of the same, in which Figure 1 represents a side elevation of a wood-planing machine embodying my invention.

illustrating the character of work for which my improved planing-machine is adapted.

Similar letters refer to similar parts in the different figures.

My present invention relates to a woodplaning machine designed for planing the curved surfaces of chair-backs and similar pieces of wood which are formed in the arc of a circle; and it consists in the construction and arrangement of parts, as hereinafter described, and set forth in the annexed claims.

Referring to the drawings, A and A are two upright side frames which support the operative parts of the machine. The side rames A A are provided on their inner sides with horizontal flanges A A upon which the wedges A A rest. The wedges A A support a vertically-adjustab1e framework consisting of the sides A A which are provided at their lower edges with inclined flanges A A resting upon sliding wedges A A and a curved top A', which forms a supporting-table for the work after it passes the lower cutter-head. The sides A A are provided on their inner sides with horizontal flanges A parallel with the flanges A and between the flanges A and the inclined flanges A are sliding wedgesA A Pivoted at A in the sides A is a curved table A upon which the work is supported as it approaches the cutter-heads. The Wedges A A are con-- nected by a cross-bar A provided with a de pendent lug A in which is journaled a screw A engaging a fixed nut held by the frame work of the machine and carrying at its outer end a hand'wheel A by which the wedges A A are moved along upon the horizontal flanges A A for the purpose of raising or lowering the work-supporting tables A and A Projecting upwardly from the cross-bar A is a lug A in which is jon rnaled a screw A", engaging a nut A in across-bar A, which connects the upper wedges A A The screw A is provided with a hand-wheel A by which the screw is rotated to move the upper wedges A A longitudinally between the horizontal flanges A A and the inclined flanges A A for the purpose of clamping the inclined flanges A A between the upper and lower wedges and holding them firmly in position. In order to raise the work-supporting tables A and A the upper wedges A are moved toward the front of the machine sufficiently to release the inclined flanges A The lower wedges A are moved toward the front of the machine, thereby raising the tables A and A The upper wedges A are then drawn back by the upper screw A to again clamp the inclined flanges A between the upper wedges A and the lower wedges A As the upper adjustable screw A is journaled in the lug A which is carried by the cross-barA connecting the lower wedges. A the rotation of the hand-Wheel A alone will move both the upper and lower wedges simultaneously when the upper wedges have once been released. The sides A A*, by which the tables are supported, are provided with mortises A to allow the cross-bar A to pass through and connect with the wedges A A Supported by the sides A**A is a bar B,which extends transversely through the machine and is provided on its upper side with a rib B, entering a corresponding groove in a bar B in which the shaft B of the lower cutterhead B is journaled. The bars B and B are united by screws B B and by withdrawing the screws B the upper bar B and the cutteia head journaled therein can. be drawn along the bar B and removed from the machine. Held in recesses in the bar B are wedges B through the arm C and is screwed into the lug C the screws C and 0 serving to vary the position of the arm 0 relatively to the lug O and rock the work-supporting table A ,so as to raise or depress the rear edge A of the table.

The table A has an extension A providing an unobstructed curved surface upon which a curved chair-back, like that shown at X, Fig. 6, can be placed and arranged with its concave side accurately fitting the convex surface of the table extension A thereby making the chair-back coincide with the table and preventing torsion of the back when the pressure is applied.

J ournaled in boxes held in a fixed position and; supported by the side frames A'and A is a shaft D, carrying the upper cutter-head D, which is located in a vertical plane at the rear of the lower cutter-head B and above the rigid work-supporting table A.

Arranged above the tables A and A are feed-rolls D and D ,carried upon shafts which are journaled in boxes capable ofa slight vertical movement and acted upon by spiral springs D which are applied to press the boxes downwardly and have their tensions regulated by the adjusting-screws D in the usual manner in wood planing machines. The feed-rolls D 'are smooth; but the feedrolls D in front of the upper cutter-head are preferably fluted in order to engage the upper surface of the chair-back and draw it over the curved table A and project it forward over the table A and beneath the upper'cutter-head. The feed-roll D or the last edge A depressed slightly below the front edge A of the rigid table A, the vertical difference between the planes of the two table edges being equal to the amount of stock re- ,fnoved by the lower cutter-head B so that fable determines the depth of the. cut made by the lower cutter-head, and the vertical adjustment of the rigid table A relatively to the upper cutter-head determines the thickness of the finished chair-back, and the adjustment of the lower cutter-head by means of the wedges B B and the nuts 13' B permits thelower cutter-head to be raised or lowered relatively to the upper surface of the rigid table A, so as to make the circle described by the cutting edges of the knives of the. lower cutter-head tangential to the circular plane of the rigid table A.

The axes of the feed-rolls are arranged in the arc of a circle concentric with the circular arc of the table A, and the shafts of the feed-rolls carry pinions D which are engaged by a rotating gear D carried upon a shaft D which is journaled in boxes supported by the side frames A andA. The rotating gear D is driven by'a pinion D carried bya shaftD, which extendstransversely across the framework and is connected at the opposite side of the machine with thedriving power. The rotating gear D constitutes an annular rack rotating around the axis of the shaft D which is journaled concentrically with the curved surface of the rigid table A, causing all the feed-rolls to be simultaneously driven at a uniform speed.

Immediately in front of the upper cutterhead D is a yielding presser-bar E, with its endssuspended from bracketsE", attached -to the fixed part of the. machine, one of said brackets being shown in Fig. 5. The presserbar E is supported by means of'screw-threaded bolts E which pass through the brackets and are screwed into the end of the presserbar. Each of the brackets E is prolvided' with a recess-which contains a spiral spring- E with its tension applied to force the presser-bar downwardly upon the work as it approaches the upper cutter-head. The presser-bar E is maintained in an upright position" and held from twisting or turning by means of tenons E projecting from each end and entering vertical grooves or ways in the framework,

one of said tenons being shown in Fig. 5..

As the chair-backs pass through the machine they fall downward from the rigid table A and are caught by a curved trough F, supported between the sides A and A and sufficientlyinclined to cause eachchair-back to slide from the rear to the front of the machine and be delivered at the lower end F, thereby permitting the attendant who feeds the work to the machine to also remove the finishedchair-backs from the same side of the machine at which they'are fed. Therear end of" the inclined trough F iscurved u-pwardl-y outside the path of the chair-back as it falls from the table A, so that thefalling chair-back will be caught by the curved rear end of the trough; but su fficientspace is left between the table A and the rear end of the trough E' to allow the planed chair-backs to be removed by an attendant, if required;

IIO

grooves in the stationary sides A and A and serve as guides, so that the adjustment of the frame carrying the work-supporting table by means of the wedges A A will move the sides A A in a vertical plane.

The adjustment and operation of the machine are as follows: The lower cutter-head B is vertically adjusted by means of the wedges B to bring the cutting edges of its knives in proper position relatively to the surface of the rigid table A The table A is then adjusted relatively to the upper cutter-head D to determine the thickness of the finished chair-back by means of the wedges A A When the proper adjustment of the table A has been accomplished, the inclined flanges A A are clamped against the adj ustingwedges A A by means of the clampingwedges A A thereby maintaining the table A rigidly in its proper position relatively to the upper cutter-head D. The rocking table A, which is carried by the sides A A and has therefore been adjusted vertically with the table A by means of the wedges A A is then rocked upon its pivots A by means and a revolving cutter-head journaled therein,-of a framework supported by said fixed framework and vertically adjustable therein, a curved work-table rigidly attached to said adjustable framework, a curved work-table pivoted on said adjustable framework and means for adjusting said pivoted curved table, whereby its plane is varied relatively to said rigid table, substantially as described.

2. The combination with the feed-tables A and A curved in the arcs of circles, of a lower cutter-head placed between the table A and the table A an upper cutter-head placed above the front edge of the table A a series of feed-rolls adapted to engage the work upon the side opposite said tables, and means for oscillating the table A, whereby its front edge A is raised or lowered relatively to said lower cutter-head, substantially as described.

3. The combination with a fixed framework and a revolving cutter-head journaled therein, of a framework supported by said fixed framework and vertically adjustable therein,

a curved work-table rigidly attached to said adjustable framework, a curved work-table pivoted on said adjustable framework, means for adjusting said pivoted table relatively to said rigid table and a series of pressurerolls arranged above and concentrically with the curved worktables, substantially as described.

4. The combination with a fixed framework of the adjustingscrews C and C in order to .de press the rear edge A of the table A relatively to the front edge A of the rigid table A and also to the path of the knife-edges of thelowercutter-headB. Thisadjustmentof the rocking table A determines the depth of the cut made by the lower cutter-head. The presser-bar E is then adjusted in proper position to cause the tension of the springs E to crowd the chair-back against the surface of the table A and the tensions of the springs E and of the feed-roll springs D are adjusted to provide the requisite pressure upon the chair-back. The chair-backs to be planed are placed upon the curved extension A and are arranged thereon so that the curvature of the chair-back exactly fits the curvature of the extension A which causes the axis of the curvature of the chair-back to coincide with the axis of the curved table A over which the chair-back is moved by the attendant until it is engaged by the feed-rolls D which hold the chair-back in close contact with the table A and also move it forward over the lower cutter-head and uponthe table A, where it is engaged by the feed-roll D and moved beneath the presser-bar E and the upper cutter-head and delivered over the table A by the rolls D into the upper end of the inclined trough F, by which the planed chairback is returned to the front side of the machine.

What I claim as my invention, and desire to secure by Letters Patent, is

and an upper cutter-head journaled theiein, of an adjustable framework, a pair of sliding adjusting wedges supported by said fixed framework and bearing against said adj ustable frame, a pair of clamping-wedges between said fixed and said adjustable frameworks and acting in opposition to said adj usting-wedges to clamp said adjustable framework in position and connected means for moving said adjusting and said clamping wedges simultaneously, substantially as described.

5. The combination with a fixed framework, of a movable framework, a pair of adjusting wedges by which said movable frame is raised, or lowered, means for sliding said adjustingwedges, a cross-bar connecting said Wedges, a lug projecting upwardly from said crossbar, a pair of clamping-wedges acting in opposition to said adjusting-wedges, an adj usting-screw carried by said lug and engaging said cross-bar whereby said clamping-wedges are moved simultaneously with said adjusting-wedges and are capable of independent adjustment, substantially as described.

6. The combination with a curved worktable A and upper and lower cutter-heads D and Bof a pivoted curved work-table A provided with an arm 0 and adjusting-screws carried by said arm, whereby said table A is rocked relatively to the table A and held in position, substantially as described.

7. The combination with a curved worktable A of an inclined trough F located bel. The combination with a fixed framework l neath said table having an upwardly-curved IIO rear end projecting beyond the curved plane the edge of table A and at the rear of the of said table, substantially as described. lower cutter-head and means for applying 8. The combination of the curved work-suppressure to said feed-roll, substantially as deporting tables A and A a lower revolving scribed. 5 outter-headjournaled between said tables and Dated this 10th day of March,.1897.l

at one edge of table A means for vertically adjusting said tables, means for adjusting BAXTER E said table A relatively to the table A, means Witnesses: for adjusting said lower cutter-head rela- RUFUS B. FOWLER,

1o tively to table A, a feed-roll arranged over H. FOWLER. 

